Rolling-mill for rolling seamless metal tubes.



No; 822,860. EATENTBD JUNE 5, 1906.

V 0. BRIEDE. ROLLING MILL FDR ROLLING SBAMLBSS METAL TUBES.

APPLICATION FILED I514, I903.

wrmeun: mvim'on OTTO BRlEDE, O F BENRATPL NEAR DUSSELDORF, GERMANY.

ROLLING-MILL FOR ROLLING SEAMLESS METAL TUBES- Specification of Letters Patent.

Patented June 5, 190B.

Application filed May 4,1903. Serial No, 155,600.

To all whom it mrty concern.-

Be it known that I, OTTO BRIEDE, a subject of the King of Prussia, German Em eror, and a resident of Benrath, near Dusse dorf, in the Province of the Rhine, German Emire, have invented certain new and useful j improvements in Rolling-Mills for Rolling Seamless Metal Tubes, of which the following is an exact specification.

The invention described herein relates to certain improvements in forging-machines, and has for its object a construction and combination of parts whereby a solid or lin perforate ingot or billet may be reduced or worked down to a seamless tube.

Heretofore seamless tubes have been made from solid in ots or billets by means of rolls arran ed wit their axes at an angle to the axis 0 the billet to be reduced. These rolls over a stationary mandrel, which serves to hold back or retard the forward movement of I the inner portion of the ingot. This method injures the metal by reason of the combined spiral and forward movement given to the metal.

The object of the invention described herein is to provide'for the forward movement of portions of the in ot or billet in strai ht or approximately straight linesi. 6.,Wlil101li any spiral movement or twisting of the metabover a relatively stationary mandrel, thereby avoiding any injurious punishment of the metal.

Th invention is hereinafter more fully described and claimed.

In the accompanying drawings, forming a partof this specification, Figure 1 is a side elevation of my improved for ing-machine, and 2 is in the nature of ailiawammatic viewil ustrating the operation of the forgingmachine.

In the practice of my invention the dies or 2 swages a are provided with ('O11lCall '-Sl1ap8(l grooves and are oscillated back and forth by i any suitable form or construction of driving mechanism. On the delivery side of these dies or swages I arrange a holding-bar 1), provided with a round or conical point or end c, which serves as an abutment to prevent the direct forward movement of the inner portions of the ingot or billet. The ingot or billet is fed to theswagesstep b step by any suitable form or construction of feed mechanism -.---such, for example, as that shown and tie-- l May 4, 1903. This feed mechanism consists of a sliding block I), connected to a'lever It, which is oscillated by the swnges through the ,medinm of a rod f. A- threaded bar in passes through the sliding block and is proadapted to bear against the cnd=of a billet being operated on. The billet can be supported while being fed to the swages in any manner known in the art. The bar In is rotated to move it forward through the sliding block and to rotate the billet by a driven gear-wheel 11, mounted in a bearing 9 on bedplate. The bar m passes through the gearwheel and is so locked thereto that the barwill be rotated by the wheel, but is free to move therethrough. As the billet or ingot follows the back-and-forth movements of the dies or swages provision is made in the feed mechanism for permitting or causing such oscillation of the ingot or billet without interfering with the necessary onward feed of the ingot or billet. As a back-and-forward movement 5 of the ingot or billet while the holding-bar is stationary would subject the latter to severe and injurious strains, it is preferred that provision should be made for a back-andforth movement of the holding-bar synchronous with and equal to the movement of the swaging-dies a. This reciprocation of the holdingbar can be effected conveniently by securin it to a sliding block 6. which is moved bac and forth by one of the dies or swages connect ed by a rod f to the lever 9, said lever being connected to the sliding block by a link it. As a rotation of the conical or round head 0 is in some cases desirable, provision is made for the rotation of the holding-bar by so mounting the bar in the sliding block that it can turn therein, but will move back and forth therewith. The holding-bar is rotated by a powendriven wheel *5, mounted in a bearing on the bed of the slide, and the holdin -bar 5 passes through the hub of the wheel an is so connected thereto, as by a spline and groove,

be free to move back and forth longitudinally therein.

. It is characteristic of my improvement that l the metal of the ingot or billet is forced for- I ward in straight or approximate] straight 1 lines over the head or cone 0, an although l the billet or ingot is rotated to bring all portions under the action of the dies or swages r i i the turning occurs when thebillet or ingot is released from the bite of thedies, or practically that the bar will rotate with the wheel and vided at its inner end w ith a yielding head 0,

so, and hence there will not be any twisting or distortion of the metal;

I claim herein as my invention- 1.' In a forging-machine the combination of oscillatory dies or swages an abutment arran ed between the dies or swages in line wit 1 the axis of the bars and means for imparting a reciprocatory movement to the abutment equal to the peripheral movement of tile dies or swages and synchronous there- Wit 2911 a forging nachine the combination of oscillatory dies or,swages, mechanism for feeding the billet step by step between the dies and swages, an abutment arran ed between the dies or swages in line with t e axis of the bars, and means for im arting a reciprocatory. movement to the a utment equal to the peripheral movement of the dies or swages and synchronous therewith.

3. In a for ing-rnachine, the combination ofoscillatory iesor swages,afeedlnechanism, means for reciprocatin the feed mechanism, a holding-bar arranged on the delivery side of the dies or swages and provided with a shaping-head arranged between the dies or es, and means for reci rocating the holdini-har synchronously wit 1 thedies or swages, su stantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

OTTO BRIEDE. Witnesses:

MAX WESGHAR,

WILLIAM EssENwEIN; 

